(copy/paste everything between the stars)
follow a directory:

***
mkdir ~/logtest
journalctl --directory ~/logtest -f
***
(i put the output of this journalctl to the bottom of this file)

then log into this directory:

***
echo "__CURSOR=s=b8251891acca4dc290d740f6d17e6e65;i=1248;b=7f272978644b4ee1bf5d375ff2bdda57;m=ac1b0c94a;t=514b03d810138;x=d9bf4c3b3d82d447
__REALTIME_TIMESTAMP=1430122062217528
__MONOTONIC_TIMESTAMP=46199261514
_BOOT_ID=7f272978644b4ee1bf5d375ff2bdda57
_UID=1000
_GID=1000
_MACHINE_ID=dca72f9011fc456b8c70371ad5ecdd52
_HOSTNAME=virtual-fedora-sbs
_TRANSPORT=syslog
SYSLOG_FACILITY=1
PRIORITY=5
SYSLOG_IDENTIFIER=tpiadmin
MESSAGE=a
_PID=9617
_SOURCE_REALTIME_TIMESTAMP=1430122060575304

__CURSOR=s=b8251891acca4dc290d740f6d17e6e65;i=1247;b=7f272978644b4ee1bf5d375ff2bdda57;m=ac197cd91;t=514b03d68057c;x=da399a0b1e105d04
__REALTIME_TIMESTAMP=1430122060580220
__MONOTONIC_TIMESTAMP=46197624209
_BOOT_ID=7f272978644b4ee1bf5d375ff2bdda57
_UID=1000
_GID=1000
_CAP_EFFECTIVE=0
_SYSTEMD_CGROUP=/
_MACHINE_ID=dca72f9011fc456b8c70371ad5ecdd52
_HOSTNAME=virtual-fedora-sbs
_TRANSPORT=syslog
SYSLOG_FACILITY=1
PRIORITY=5
SYSLOG_IDENTIFIER=tpiadmin
_COMM=logger
MESSAGE=b
_PID=9621
_SOURCE_REALTIME_TIMESTAMP=1430122062218315

" | /lib/systemd/systemd-journal-remote -o  ~/logtest/test.journal -
***

the second entry will trigger rotation due to an earlier timestamp. i suspect this rotation to be the reason that the entry won't be shown.

###(output of journalctl)
Apr 27 10:07:40 virtual-fedora-sbs tpiadmin[9617]: a
###